CUP WASHER

A CUP WASHER is a washer with a recessed or cup-shaped profile. It may also be referred to as a cup-type washer. It can be used with countersunk, round, pan, or other specified screw head types, allowing the screw head to seat within the recessed area. This helps increase the contact area and improve the overall appearance of the assembly.

Product Name: CUP WASHER / Cup Washer
Product Structure: Washer with a central hole and a recessed, cup-shaped, or bowl-shaped outer profile
Primary Functions: Supports the screw head, distributes fastening pressure, and protects the workpiece surface
Applicable Screws: Countersunk head, round head, pan head, or other specified screw head types
Inner Diameter: Selected according to the size of the matching screw or bolt
Outside Diameter and Height: Standard dimensions or as specified by drawing
Materials: Carbon steel, stainless steel, brass, aluminum, plastic, or other specified materials
Surface Treatments: Zinc plating, nickel plating, chrome plating, black oxide, passivation, or other specified finishes
Production Methods: Stamping, deep drawing, machining, or other processes according to product structure
Production Options: Standard specifications or custom production based on drawings
Packaging: Bulk packing, bag packing, or box packing

Category:

Supports and Seats the Screw Head

The cup-shaped recess accommodates the screw head, providing a more stable seating surface after installation and helping reduce head misalignment or direct pressure on the workpiece.

Distributes Fastening Pressure

The larger outside diameter increases the contact area with the workpiece, distributing fastening pressure over a wider area and helping reduce localized indentation or deformation around the mounting hole.

Protects the Workpiece Surface

The CUP WASHER separates the screw head from the workpiece, helping reduce scratches, indentations, and coating damage caused by tightening, removal, or vibration.

Improves Assembly Appearance

The cup-shaped profile helps create a cleaner appearance around the screw installation area and can cover larger mounting holes or exposed edges. It is suitable for equipment, furniture, and decorative components where appearance is important.

Multiple Material Options Available

Metal or plastic materials can be selected according to strength, rust resistance, corrosion resistance, insulation, and appearance requirements, with different surface treatments available as needed.

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